Enhanced descriptions from Syndetics:

Gareth Evans returns to the director's chair along with his former leading man Iko Uwais for The Raid 2, which follows officer Rama (Uwais) as he is tasked with bringing down a nefarious and powerful criminal by going undercover and befriending the gangster's son, who is currently behind bars. Later, Rama's quest leads him straight to the corrupt politicians and vicious crime lords who have taken over his city. The Raid 2 screened at the 2014 Sundance Film Festival. ~ Perry Seibert, Rovi

Formidable though they may have been, Rama's opponents in that fateful building were nothing more than small fish swimming in a pond much larger than he ever dreamed possible. And his triumph over the small fry has attracted the attention of the predators farther up the food chain. His family at risk, Rama has only one choice to protect his infant son and wife. He must go undercover to enter the criminal underworld himself.

Special features: Director commentary; Q&A with Gareth Evans, Iko Uwais, and Joe Trapanese; The next chapter: Shooting a sequel.